EP 1085301 B1 20130116 - Vortex Flowmeter
Title (en)
Vortex Flowmeter
Title (de)
Wirbel-Durchflussmesser
Title (fr)
Débitmètre à tourbillons
Publication
Application
Priority
- JP 26075299 A 19990914
- JP 2000200846 A 20000703
Abstract (en)
[origin: EP1085301A2] The present invention provides a vortex flowmeter for measuring the flow rate of a fluid by detecting an alternating signal produced by Karman vortices using a sensor, comprising a low-pass filter for letting pass through the frequency band of the alternating signal that is determined by the diameter and flow-rate range of the vortex flowmeter; subband filters for splitting the frequency band passing through the low-pass filter into a plurality of component bands; a spectrum analyzer for analyzing the plurality of component bands; and a bandpass filter for letting pass through a frequency band to be measured, according to the analysis results of the spectrum analyzer, thereby permitting flow-rate measurement with higher precision.
IPC 8 full level
G01F 1/32 (2006.01)
CPC (source: EP US)
G01F 1/3287 (2022.01 - EP US)
Designated contracting state (EPC)
DE GB NL
DOCDB simple family (publication)
EP 1085301 A2 20010321; EP 1085301 A3 20071205; EP 1085301 B1 20130116; CN 1206516 C 20050615; CN 1288149 A 20010321; JP 2001153698 A 20010608; JP 3765384 B2 20060412; US 6480812 B1 20021112
DOCDB simple family (application)
EP 00118681 A 20000829; CN 00127013 A 20000914; JP 2000200846 A 20000703; US 64525800 A 20000824